In the months following the March 1952 coup, Fidel Castro, then a young lawyer and activist, petitioned for the overthrow of Batista, whom he accused of corruption and tyranny. ... After deciding that the Cuban regime could not be replaced through legal means, Castro resolved to launch an armed revolution.
I'm not 100% sure but it could be: Voluntary Exchange takes place between buyers and sellers: (btw I copied and pasted from the question so I didn't take any content :D)
